Transistor Switching Circuit for Fast Output Voltage Discharge
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing semiconductor devices for power supply to loads face challenges in efficiently reducing the output voltage to 0 V during an off operation, leading to prolonged times and potential circuit deterioration.
Innovation Solution
The semiconductor device incorporates a control circuit that manages the timing for turning on/off specific transistors, including the use of switching circuits with transistors and resistors to control voltage levels and discharge paths, ensuring rapid reduction of output voltage to 0 V.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional switching control is used in existing semiconductor devices, then the device structure remains simple, but the output voltage takes prolonged time to reduce to 0 V during off operation
Solution Approach 1:
The switching control is divided into multiple stages: first turning off the third transistor to stop voltage generation, then turning on the second transistor to create a discharge path, and finally turning off the fourth transistor after a predetermined period. This segmented approach enables rapid voltage reduction to 0 V while maintaining reasonable circuit complexity through systematic control sequencing.
Solution Approach 2:
The control circuit performs preliminary action by turning on the second transistor before turning off the fourth transistor. This preliminary discharge path establishment ensures that voltage is rapidly reduced to 0 V before the fourth transistor is switched off, preventing voltage spikes and achieving fast voltage reduction while protecting the circuit.
2Reliability
If conventional switching control is used, then the control circuit remains simple, but circuit deterioration occurs due to prolonged voltage reduction time
Solution Approach 1:
The control circuit segments the switching control into distinct phases: stopping voltage generation by turning off the third transistor, creating a discharge path by turning on the second transistor, and finally turning off the fourth transistor after a predetermined period. This segmented control improves circuit reliability by ensuring complete voltage reduction to 0 V, preventing circuit deterioration while maintaining manageable control circuit complexity through systematic sequencing.
Solution Approach 2:
The control circuit uses feedback by monitoring the output voltage level and using this information to control the timing of transistor switching. The control circuit determines when to turn off the fourth transistor based on the voltage reduction progress, ensuring reliable voltage reduction to 0 V and preventing circuit deterioration through adaptive control.
3Productivity
If rapid voltage reduction is implemented, then operational efficiency improves, but the switching control becomes more complex
Solution Approach 1:
The switching control is segmented into efficient stages: immediately turning off the third transistor to stop voltage generation, rapidly turning on the second transistor to create a discharge path, and turning off the fourth transistor after a predetermined period. This segmented approach achieves rapid voltage reduction to 0 V, improving operational efficiency while keeping switching control complexity manageable through systematic sequencing.
Solution Approach 2:
The control circuit employs periodic action by using a predetermined time period to control when the fourth transistor is turned off after the second transistor is activated. This periodic timing ensures rapid and complete voltage reduction to 0 V, improving operational efficiency while maintaining relatively simple control logic through time-based switching sequences.
Data Source
AI summary
Switching device includes a first terminal, a second terminal, a first transistor, a second transistor, a third transistor, a fourth transistor, and a control circuit. The control circuit is configured to control the first transistor, the second transistor, the third transistor, and the fourth transistor. The control circuit is configured to, when supply of the first voltage to the third node is stopped, turn the second transistor from an off state to an on state, turn the third transistor and the fourth transistor from an on state to an off state, and after a first period passes, turn the first transistor from an off state to an on state.